Resultant of three forces about a point O

[BigJon]

My question is to find the resultant just take the x,y components of each force, find the magnitude by squaring them and taking the square root. My question is after doing that how would i find the perpendicular and horizontal distances.

My teacher put a study guide for our test and it said resultant of 3 forces about a point, 2-D, 2-D moments.

Maybe i misinterpreting what he really wants?

The picture is not the actual problem just an example.

 

[voko]

The language of your query is confusing. Please explain accurately what you are given and what you are supposed to find. Then explain your approach and your difficulty with the approach.